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https://issues.apache.org/jira/browse/HIVE-4732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766543#comment-13766543
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Ashutosh Chauhan commented on HIVE-4732:
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Thanks, [~kamrul] for addressing concern. Overall looks good. One quick
question: I see in AvroGenericRecordWritable::write(Dataoutput out) this line
out.writeUTF(recordReaderID.toString()); Doesn't this mean id is now persisted
on-disk? I thought id is generated by reader at read time and than added to
record, but I don't get why while writing record we need to write it. Seems
like I am missing something obvious.
> Reduce or eliminate the expensive Schema equals() check for AvroSerde
> ---------------------------------------------------------------------
>
> Key: HIVE-4732
> URL: https://issues.apache.org/jira/browse/HIVE-4732
> Project: Hive
> Issue Type: Improvement
> Components: Serializers/Deserializers
> Reporter: Mark Wagner
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-4732.1.patch, HIVE-4732.v1.patch
>
>
> The AvroSerde spends a significant amount of time checking schema equality.
> Changing to compare hashcodes (which can be computed once then reused) will
> improve performance.
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